William a



` mM-e W. A. SARGBNT.

Force Pump.

No. 240.771. Patented April 26.1881.

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In vetov:

MII-ianv J1. Songe uff UNITED STATES,

PATENT OEErcE..

VILLIAM A. SARGENT, OF DES MOlNES, IOWA, ASSIGNOR VOF ONE-HALF TO JACKSON VVISEHART, OF SAME PLACE.

FORCE-PUMP.

SPECIFICATION forming part of Letters Patent No. 240,771, dated April 26, 1881.

Application tiled December 9, 1880.

To all whom tt may concern Be it known that I, WiLLrAM A. SARGENT, a citizen of the United States, residing at Des Moines, in the county of Polk and State of Iowa, have invented new and useful Improvements in Force-Pumps, of which the following is a specification.

My inventionv relates to doubleacting hand force-pumps, its object being to simplify and 1o render efficient and durable pumps ot' this class; and it consists in certain novel features of construction, which will be hereinafter fully described, and pointed out in the claim hereto appended. t 5 In the accompanying drawings, Figure 1 is a side elevation, and Fig. 2 is a vertical section, of a pump constructed according to myinvention. Fig. 3 is a detached view of one of the gaskets and valve-leathers.

The letter Aindicates the pump-barrel, cast with seats B, having ears or lugs B', by which the barrel may be bolted to the hollow pumpstock C, and having top and base plates, D and E, provided with ears d and e, and secured in place by tension-rods F and nuts f.

Gr is a suction-pipe leading from a point near the top ofthe pump-barrel, and terminatingin au enlarged portion, G', about on a level with the base of said barrel, said enlarged portion having a base-plate, H, provided with ears h,

and secured in place by bolts passing throughsaid ears and lugs cast on the enlargement. The baseplates E and H ot' the barrel and suction-pipe have tlanges or rims e' and 7L', which lit around the peripheral edges of said barrel and the enlarged portion of the suction-pipe, respectively.

Between the end edge of the barrel and its y base-plate is arranged the margin ot' a leather gasket, I, which is formed in one piece with the valve-leather K, the two being composed of a circular leather disk, nearly encircling a central portion of which is cut a narrow segmental aperture, whichserves to detach the valve-leather from the surrounding portion, eX-

cept for a short distance, the part l between the terminals of the segmental cut serving as `ing, m, of said plate.

(No model.)

M is the valve, which may be made ot any 5o suitable material, having sufficient weight to hold it well upon its seat, which is the inner face of the base-plate, around a central open- Froln the top ot' the valve rises a curved spring', N, which extends 55 toward and terminates at a suitable distance from the inner surface ot' the barrel.

Through the wall'of the barrel, near its top and bottom, are formed ports o o', which pass through the centers of the seats B B.

Between the edge of the enlargement ot' the suction-pipe and its base-plate is a gasket, l', having the valve-leather K formed in one piece therewith, and carrying a valve, M', provided with a curved spring, Nl, all identical in construction with those just described at the bottom of the barrel.`

O is the hollow pump-stock, provided with a spout, c. Through the wall of the stock are formed passages p pf, leading to its bore, these 7o passages being the same distance apart as the ports o o of the barrel, and coinciding concentrically with said ports when the barrel is secured to the stock, as shown in Fig. 2,`the passages p p being considerably larger in diameter than the ports o o. Between the seatsB B and the outer surface ofthe stock are arranged gaskets l2 and I3, each formed in one piece with a valve-leather, K2 and K3, carrying valves M2 and M3,`provided 8o with a spring, N2 and N3, all similar to those described for the barrel and suction-pipe, eX- cept that the valves M2 and M3 are hung vertically and open upward, their springs striking the walls ot' the passages p p'.

The letter Q designates the piston or plunger,`which works in the barrel and may be packed in any ordinary manner.

B. is the piston-rod, which passes through a central aperture in the top plate, and is con- 9o nected with the lower end of a pitman, It', the upper end of which is connected to a crank, S, secured to the end ot' a shaft, T, which has its bearings in the upper portion of the pumpstock, and is provided with a winch, U.

When, by turning theshaft S, the piston is raised, a vacuum is produced below the piston Q, the valve M is raised, and water ows into the barrel, the spring N striking the wall ot' the barrel after thevalve rises some distance, and being somewhat compressed during the time the valve is raised; but immediately the direction of the piston is reversed the valve is relieved of the upward pressure ot' the water and its spring suddenly reacts, causing the valve to promptly resume its seat. The spring offers no resistance tothe initial rising of the valve, and is only compressed when the water has attained a considerable momentum. Said spring does not in the least oppose the suction. At the same time the valve M2 is forced back, opening the port o and permitting the water to low to the bore ot' the stock. rlhe descent of the piston causes the vacuum about and in the suction-pipe, so that the valve M at the bottom of said pipe is raised, and water iiows through the pipe to the upper portion ot' the barrel, the valve M3 remaining closed until the piston again moves upward, when it is forced back and permits the wat-er above the piston to flow to the stock. As soon as the waterpressure upon any one of the valves ceases it is thrown back promptly to its seat by the action of its spring.

Heretot'ore a pump has been constructed of a stationary discharge-pipe connected with a cylinder by two pipes, one entering the cylinder at the top and the other at the bottom, a supplemental pipe being connected with the top of the cylinder and its lower end being open to the water, as in United States Patent No. 193,689. A force-pump has also been constructed of an ordinary pump-stock having lateral ports communicating with a cylinder detaehably connected with one side of the pump-stock, as in United States Patent No. 184,613, and as the structures shown and described in these patents are not my invention, they are hereby disclaimed.

What I claim isv The combination, With the pump-stock C, having the lateral passages p p', of the pumpbarrel A, detachably connected with one side of the pump-stock, and provided with the inlet-valve M at its lower end, and the lateral valved )orts o o communicatinor with the interior of the pump-stock through its lateral passages, the suction-pipe G, leading from the top ot' the pump-barrel and terminating nea-r the base ot' the latter in a valved portion, G', and the piston Q,connected with operating devices and arranged to reciprocate between the valved ports o o', all substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

W. A. SARGENT.

Witnesses:

W. H. MILLER, R. F. SMILY. 

